/*
 GNU Maverik - a system for managing display and interaction in 
               Virtual Environment applications.
 Copyright (C) 1999 Advanced Interfaces Group

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA


 The authors can be contacted via:
 www   - http://aig.cs.man.ac.uk
 email - maverik@aig.cs.man.ac.uk
 mail  - Advanced Interfaces Group, Room 2.94, Computer Science Building, 
         University of Manchester, Manchester, M13 9PL, UK
*/


#include "mavlib_windows.h"
#include <stdio.h>

MAV_callback *mav_callback_resize;



/* Wrapper routines to set and execute the resize callback */

void mav_callbackResizeSet(MAV_window *w, MAV_callbackResizeFn fn)
{
  mav_callbackSet(mav_callback_resize, w, mav_class_world, (MAV_callbackFn) fn);
}

int mav_callbackResizeExec(MAV_window *w, MAV_resizeEvent *re)
{
  return mav_callbackExec(mav_callback_resize, w, mav_object_world, (void *) re, NULL);
}



/* Routine to deal with this event */

int mavlib_dealWithResizeEvent(int *info)
{
  MAV_resizeEvent re;
  
  /* Make up event data structure */
  re.win= mavlib_getWindow(info[0]);
  re.width= info[1];
  re.height= info[2];

  return mav_callbackResizeExec(re.win, &re);
}



/* Default event handling routine */

int mav_resizeDefault(MAV_object *obj, MAV_resizeEvent *ev)
{
  MAV_window *orig_win= mav_win_current;
  
  /* resize window keeping the same field of view */

  if (ev->win!=mav_win_current) mav_windowSet(ev->win);

  mav_gfxViewPortSet(0,0,ev->width,ev->height);
  ev->win->width= ev->width;
  ev->win->height= ev->height;
  mav_windowPerspectiveSet(ev->win, ev->win->ncp, ev->win->fcp, ev->win->fov, ((float) ev->width)/ev->height);

  if (mav_win_current!=orig_win) mav_windowSet(orig_win);

  return -100;
}

